sqdlab.github.io

ACQ Acqusition device:

This is HAL type for data acqusition devices. For SQDLab, currently there are 3 devices:

  1. M4i Spectrum Digtizer card (Digitizer).
  2. ETH FPGA (fpga).
  3. Tabor Digitizer (Digitizer).
  4. VNA

For using any of these device, 2 key components are required:

  1. Qcodes driver through YAML.
  2. Processor.

In addition to these, a trigger source is generally needs to be set, which must be a trigger type object.

This hal provides the following parameters:

Note that parameters heading containing (!) sign, must be only tampered with after complete understanding of the stack. Imporper setting of these variable can cause unexpected behavior, which is NOT a bug.

List of Parameters :

Number of Samples:

Number of samples to acquire in a single run of acquistion. This can also tell for how long are you measuring: num.of.samples/sampling rate = time of acq.

lab.HAL("DigiC").NumSamples = 1024

Number of Segments:

Number of different times you want to measure in one run of the experiment.

lab.HAL("DigiC").NumSegments = 1

Number of Repetitinos:

Number of times you want to average or repeat the entire experiment.

lab.HAL("DigiC").NumRepetitions = 2**9

Sampling rate(!):

Set or get the Sampling rate of the device. NOT recommended to change this setting unless you know about the device in detail..

lab.HAL("DigiC").SampleRate = 5e6

Trigger Edge(!):

Set if the device should be trigger at the rising edge or falling edge. NOT recommended to change this setting unless you know about the device in detail..

lab.HAL("DigiC").InputTriggerEdge = 1 #positive

Set Processor:

Set the data processing device of type Processor to be used.

lab.HAL("DigiC").set_data_processor(myProc)

Get Data(!):

Get processed data from the device if a processor is present, else it returns raw data. NOT recommended to call this function

lab.HAL("DigiC").get_data()

Trigger Source:

Set or get the device that is responsible for trigger the acqusition device. NOTE: Input requires a trigger type object.

lab.HAL("DigiC").set_trigger_source(<Trigger_Object>)
lab.HAL("DigiC").get_trigger_source()

This completes all the functions and paramters availble as public variables. Next step is to read about Processors